Grinding-mill



(No Mod e1.)

- .J. JONES.

GRINDING MILL.

Patented Aug. 211 881)" 21 I V \NVENTOR WITNESSES ATTORNEYS N. PETERS. PMvl-MW Wm QC.

UNITED STATES PATENT OFFICE.

JAMES JONES, OF LOUISVILLE, KENTUCKY.

GRINDING-MILL.

SPECIFICATION formingpart of Letters Patent No. 245,176, dated August 2, 1881.

Application filed April 30, 1881. (No model.)

To all whom "it may concern Be it known that I, JAMES JONES, a citizen of the United States, resident at Louisville, in the county of J efl'erson and State of Kentucky, have invented certain new and useful Improvements in Grinding-Mills; and I do hereby declare the following to be a full, clear, and exact description of the invention, such aswill'enable others skilled in the art to which it appertains to make anduse the same, reference be Fig. 2

ends, the latter, a a, curved at a a.

The concave, as shown, has in the middle the rectangular opening B. In its ends, to the sides of this opening, the frame has the seats a, their number depending upon the number of segments or sections to beused.

O 0 represent the sections, the ends 0 c of which rest in these seats, and are regulated therein by the screws 0 c. This provides an independent end adjustment for the sections, whereby a nice adjustment can be made of one without affecting the others, and of. one end more than the other. Stretched across the openings between these sections are the curved perforated metal sheets D D,'formin g the perforated aprons. The grain is reduced between the. roller or grinding-cylinder Z and the sections of sectional'concave. As the reductions are made the middlin gs sift through these aprons, obviating the necessity for and use of bolts, elevators, &c., and are carried off direct to the duster or manipulated at will.

I claim The frame A, having rectangular opening B, and seats a on each side said openin ,in combination with sections 0, the ends of which rest in said seats and are regulated therein by screws 0, giving the sections independent end adjustment, curged perforated aprons D, stretched across the opening B, and the grinding-cylinder Z, as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

JAMES JONES.

Witnesses:

D. K. STEPHENS, Units. '1. BALLARD. 

